package com.wc.codeforces.模拟.Replacement;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;

/**
 * @Author congge
 * @Date 2024/11/12 17:09
 * @description
 * https://codeforces.com/contest/2029/problem/B
 */
public class Main {
    /**
     * 有 0 有 1, 就一定有 10 或是 01, 就可以变, 如果途中没有那就完成不了了
     */
    static FastReader sc = new FastReader();
    static PrintWriter out = new PrintWriter(System.out);
    static int N = 100010;
    static char[] s = new char[N];
    static char[] r = new char[N];
    static int n;

    public static void main(String[] args) {
        int T = sc.nextInt();
        while (T-- > 0){
            n = sc.nextInt();
            s = sc.next().toCharArray();
            r = sc.next().toCharArray();
            int a = 0, b = 0;
            for (int i = 0; i < n; i++) {
                if (s[i] == '0') a++;
                else b++;
            }
            boolean success = true;
            for (int i = 0; i < n - 1; i++){
                if (a == 0 || b == 0) {
                    success = false;
                    break;
                }
                if (r[i] == '0') b--;
                else a--;
            }
            if (success) out.println("YES");
            else out.println("NO");
        }
        out.flush();
    }
}

class FastReader {
    StringTokenizer st;
    BufferedReader br;

    FastReader() {
        br = new BufferedReader(new InputStreamReader(System.in));
    }

    String next() {
        while (st == null || !st.hasMoreElements()) {
            try {
                st = new StringTokenizer(br.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return st.nextToken();
    }

    int nextInt() {
        return Integer.parseInt(next());
    }

    String nextLine() {
        String s = "";
        try {
            s = br.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return s;
    }

    long nextLong() {
        return Long.parseLong(next());
    }

    double nextDouble() {
        return Double.parseDouble(next());
    }

    // 是否由下一个
    boolean hasNext() {
        while (st == null || !st.hasMoreTokens()) {
            try {
                String line = br.readLine();
                if (line == null)
                    return false;
                st = new StringTokenizer(line);
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return true;
    }
}

